Danderoo, unless there is a common variation that I've never encountered on this one, I'm thinking the magic numbers are
... 72 for a master set
... 73 for a miracle set (!)
==> Also, one other thought: WW is not a particularly difficult set to assemble, but quite a challenging one to assemble in high grade. WW cards usually seem to really show their age, with rounded corners, creasing, etc. Would be great to see a really stellar virtual set online. (Haven't seen Bill's scans yet, but it would be really great if we could have a real showpiece, high-grade set to view; can upgrade as a group, over time, if needed).